Are claims of a white genocide in South Africa real?

An Afrikaner lobby radical has displayed thousands of white crosses on the National Mall in Washington, D.C., saying they represent the victims of a genocide of white people in South Africa. South Africa's current ambassador to the United States, Roelf Meyer, says that the conception of a wide assault on the white Afrikaner population in South Africa does not exist. Meanwhile, the Trump administration is readying to admit up to 17,500 further white Afrikaners as refugees in the next 12 months, according to an announcement sent to Congress on Tuesday. The BBC's North America correspondent, Ione Wells, explains what role the United States has played in the assertion of a genocide.